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Published online by Cambridge University Press: 04 August 2017
Both observational and theoretical studies of molecular cloud chemistry are hindered by many difficulties which are partially circumvented by studying the relative abundances of isomers synthesized from a common set of chemical precursors. Theoretical studies aimed at understanding interstellar abundance ratios for the isomers HCN/HNC, HCO+/HOC+, CH3CN/CH3NC, and C3H2 have been performed.